Cut the radish and potatoes into bite-sized pieces.
Roughly chop the onion and green onion.
Add cooking oil to a pan and stir-fry the potatoes, radish, and onion.
Pour in 200ml of water and bring to a boil.
Add 1 tablespoon of Dashida.
Season with soy sauce and sugar to taste.
Once the sauce thickens, add the green onion and finish.